Transport in animals

Question 1

What are the 4 types ?

Answer 1

• Open cs
• Closed cs
• Single closed cs
• Double- closed cs

Question 1

What is a circulatory system ?

Answer 1

• They transport gases and nutrients around organisms in a transport liquid and are transported in vessels and pump to move liquid (heart)

Question 2

Explain open circulatory system

Answer 2

• Invertebrates, insects have it
• Transport Medium usuallly pumped directly to open body cavity few transport vessels
• Pumped at a lower pressure and it transports food , nutrients and nitrogenus waste and gases tracheal system
  -Once exchange has taken place the transport medium returns to heart in an open-ended vessel

Question 3

Explain closed cirulatory system

Answer 3

• Vertebrates- fish/mammals
• Blood is the transport meduim in blood vessels
• Gases - small molecules can leave through diffusion or due to high hydrostatic pressure
• Closed ciruclatory system transport the o2 and co2 and the o2 is carried by haemoglobin

Question 4

EXplain single closed

Answer 4

• Blood passes through once per cycle- fish
• passes through two sets of capillaries
• then flows into capillaries to body before returning back to the heart
• not efficient for gas exchange but works for fish due to counter current flow

Question 5

Explain double closed cirulatory system

Answer 5

• blood passes through blood twice
• one circuit of blood vessels carries blood from heart to lungs to gas exchange
• second circuit blood vessels carries blood from heart to rest of body to deliver o2, nutrients and collect waste